The Intel Wireless WiFi Link 4965AGN (codenamed Kedron) is a PCIe Mini Card
network adapter that operates in the 2GHz and 5GHz spectra. It has 2 transmit
paths and 3 receiver paths (2T3R). It is part of the fourth-generation
Centrino platform (codenamed Santa Rosa).

The Intel WiFi Link 5000 series is a family of wireless network adapters that
operate in the 2GHz and 5GHz spectra. They are part of the fifth-generation
Centrino platform (codenamed Montevina). These adapters are available in both
PCIe Mini Card (model code ending by MMW) and PCIe Half Mini Card (model code
ending by HMW) form factor. The iwn driver
provides support for the 5100 (codenamed Shirley Peak 1x2), 5150 (codenamed
Echo Peak-V), 5300 (codenamed Shirley Peak 3x3) and 5350 (codenamed Echo
Peak-P) adapters. The 5100 and 5150 adapters have 1 transmit path and 2
receiver paths (1T2R). The 5300 and 5350 adapters have 3 transmit paths and 3
receiver paths (3T3R).

The Intel WiFi Link 1000 (codenamed Condor Peak) is a single-chip wireless
network adapter that operates in the 2GHz spectrum. It is part of the
sixth-generation Centrino platform (codenamed Calpella). It is available in
both PCIe Mini Card (model code ending by MMW) and PCIe Half Mini Card (model
code ending by HMW) form factor. It has 1 transmit path and 2 receiver paths
(1T2R).

The Intel Centrino Ultimate-N 6300 (codenamed Puma Peak 3x3) is a single-chip
wireless network adapter that operates in the 2GHz and 5GHz spectra. It has 3
transmit paths and 3 receiver paths (3T3R). The Intel Centrino Advanced-N 6250
(codenamed Kilmer Peak) is a combo WiFi/WiMAX network adapter that operates in
the 2GHz and 5GHz spectra. It has 2 transmit paths and 2 receiver paths
(2T2R). The Intel Centrino Advanced-N 6200 (codenamed Puma Peak 2x2) is a
wireless network adapter that operates in the 2GHz and 5GHz spectra. It has 2
transmit paths and 2 receiver paths (2T2R). These adapters are part of the
sixth-generation Centrino platform (codenamed Calpella).

Also known as infrastructure mode, this is
used when associating with an access point, through which all traffic
passes. This mode is the default.

monitor mode

In this mode the driver is able to receive packets without associating
with an access point. This disables the internal receive filter and
enables the card to capture packets from networks which it wouldn't
normally have access to, or to scan for access points.

The iwn driver can be configured to use Wired
Equivalent Privacy (WEP) or Wi-Fi Protected Access (WPA-PSK and WPA2-PSK). WPA
is the current encryption standard for wireless networks. It is strongly
recommended that WEP not be used as the sole mechanism to secure wireless
communication, due to serious weaknesses in it. The
iwn driver offloads both encryption and
decryption of unicast data frames to the hardware for the CCMP cipher.

The driver needs at least version 5.6 of the following firmware files, which are
loaded when an interface is brought up:

/etc/firmware/iwn-4965

/etc/firmware/iwn-5000

/etc/firmware/iwn-5150

/etc/firmware/iwn-1000

/etc/firmware/iwn-6000

/etc/firmware/iwn-6050

/etc/firmware/iwn-6005

/etc/firmware/iwn-6030

/etc/firmware/iwn-2030

/etc/firmware/iwn-2000

/etc/firmware/iwn-135

/etc/firmware/iwn-105

These firmware files are not free because Intel refuses to grant distribution
rights without contractual obligations. As a result, even though
OpenBSD includes the driver, the firmware files cannot
be included and users have to download these files on their own.

A prepackaged version of the firmware can be installed using
fw_update(1).